Description:Security in southeast London is tight following a deadly attack on a British soldier Wednesday. Some had laid flowers and other tributes at the scene on Thursday morning where the man was stabbed to death in what Prime Minister David Cameron described as an apparent terrorist attack. The man was allegedly assaulted by two other men wielding knives, who hit him with a car and then pounced on him in broad daylight, shouting Islamist slogans.(1:18)